Dude if you are Iffy with what engine you want cos you wanna save for a evo...then keep the engine you have now which is probably a sohc d series and just leave it at that. If you wanna spend money on an evo then just wait and spend money on an evo. If you want to by a b16b etc there no doubt you will end up spending money on it anyways.

Figure out your priorities and find your budget and then make a decision. If it were me i would scrap the Evo idea and get a nice b series motor, LSD etc and turbo it with a high comp setup for a nice daily drive and you will forget all about the evo idea